Title:
FLUID DYNAMIC PRESSURE BEARING
Document Type and Number:
WIPO Patent Application WO/2022/186116
Kind Code:
A1
Abstract:
Provided is a fluid dynamic pressure bearing with which it is possible to keep a gap between a shaft and a sleeve constant with respect to temperature. In the present invention, a cylindrical first sleeve 14 is formed from a first metal material. A cylindrical second sleeve 15 is formed from a resin material press-fitted inside the first sleeve. A shaft 16 is inserted into the second sleeve and is formed from a second metal material. The linear expansion coefficient of the first metal material is greater than the linear expansion coefficient of the second metal material.
Inventors:
UCHIDA TOSHIYA (JP)
NAKADA YUKI (JP)
NAKADA YUKI (JP)
Application Number:
PCT/JP2022/008188
Publication Date:
September 09, 2022
Filing Date:
February 28, 2022
Export Citation:
Assignee:
NIDEC COPAL ELECTRONICS CORP (JP)
International Classes:
F16C17/02; F16C33/20
Foreign References:
| JP2001336524A | 2001-12-07 | |||
| JP2004232681A | 2004-08-19 | |||
| JP2007046752A | 2007-02-22 | |||
| JPS6310661A | 1988-01-18 |
Attorney, Agent or Firm:
S & S INTERNATIONAL PPC (JP)
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